The Rhineland-Palatinate state election, 1955 was conducted on 15 May 1955 to elect members to the Landtag, the state legislature of Rhineland-Palatinate, West Germany. |- |colspan=15| |- ! style="background-color:#E9E9E9;text-align:left;" width=300px colspan=2|Party ! style="background-color:#E9E9E9;text-align:right;" width=50px |Vote % ! style="background-color:#E9E9E9;text-align:right;" width=50px |Vote % ± ! style="background-color:#E9E9E9;text-align:right;" width=50px |Seats ! style="background-color:#E9E9E9;text-align:right;" width=50px |Seats ± |- | width=5px style="background-color: " | | style="text-align:left;" | Christian Democratic Union | style="text-align:right;" | 46.8 | style="text-align:right;" | +7.6 | style="text-align:right;" | 51 | style="text-align:right;" | +8 |- | style="background-color: " | | style="text-align:left;" | Social Democratic Party | style="text-align:right;" | 31.7 | style="text-align:right;" | –2.3 | style="text-align:right;" | 36 | style="text-align:right;" | –2 |- | style="background-color: " | | style="text-align:left;" | Free Democratic Party | style="text-align:right;" | 12.7 | style="text-align:right;" | –4.2 | style="text-align:right;" | 13 | style="text-align:right;" | –6 |- | style="background-color: " | | style="text-align:left;" | Communist Party of Germany | style="text-align:right;" | 3.2 | style="text-align:right;" | –1.1 | style="text-align:right;" | 0 | style="text-align:right;" | ±0 |- | style="background-color: " | | style="text-align:left;" | Others | style="text-align:right;" | 5.6 | style="text-align:right;" | +0.3 | style="text-align:right;" | 0 | style="text-align:right;" | ±0 |- style="background: #E9E9E9" ! style="text-align:left;" colspan=2| Total | 100.0 | — | 100 | ±0 |- | colspan=9 style="text-align:left;" | Source: parties-and-elections.de |} 1955 1955 elections in Germany 1955 in West Germany